A diode nanocavity for fast, efficient and tunable emission of highly entangled photon pairs and Fourier-transform-limited single photons

• URL: http://arxiv.org/abs/2607.11494v1
• Date: Mon, 13 Jul 2026 12:48:27 GMT
• Title: A diode nanocavity for fast, efficient and tunable emission of highly entangled photon pairs and Fourier-transform-limited single photons
• Abstract summary: We demonstrate a tunable nano-optoelectronic device based on a quantum dot embedded in a p-i-n diode circular-Bragg-grating-resonator.<n>The device generates wavelength-tunable entangled photon pairs with blinking and raw (corrected) concurrence > 0.89 (0.91) over a range of 1.6 nm.
• Score: 0.05692222313937836
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Deterministic sources of entangled photon pairs and indistinguishable photons are expected to play a key role in photonic quantum technologies. Semiconductor quantum dots are promising candidates due to their on-demand emission and compatibility with nanophotonic structures. However, current implementations face trade-offs between extraction efficiency, Purcell enhancement, as well as charge noise that causes blinking and degrades indistinguishability. Here we demonstrate a tunable nano-optoelectronic device based on a quantum dot embedded in a p-i-n diode circular-Bragg-grating-resonator and featuring extraction efficiencies up to 0.55(6) and Purcell-factor of $\sim$8. The device generates wavelength-tunable entangled photon pairs with suppressed blinking and raw (corrected) concurrence > 0.89 (0.91) over a range of 1.6 nm. The very same source also emits single, nearly Fourier-limited and highly indistinguishable photons with raw (corrected) $\mathcal{V}_{\text{HOM}}$ = 0.951(4) (0.988(6)). These results demonstrate a viable platform for semiconductor quantum photonics.

Related papers

• High-fidelity entangled photon pairs from a quantum-dot-based single-photon source [2.2911874889696775]
  Entangled photon pairs are a ubiquitous resource in quantum technologies, used in quantum key distribution and quantum networking.<n>We demonstrate a high-fidelity source of "swappable" entangled photon pairs using a semiconductor quantum dot (QD) coupled to a tunable microcavity.<n>Our results establish semiconductor QDs as a viable platform for quantum network-compatible swappable entangled photon pair generation, with feasible entanglement generation rates exceeding 0.5 Gpairs/s.
  arXiv  Detail & Related papers  (2026-03-31T16:34:30Z)
• Oscillating photonic Bell state from a semiconductor quantum dot for quantum key distribution [0.0]
  An on-demand source of bright entangled photon pairs is desirable for quantum key distribution (QKD) and quantum repeaters. Here, we demonstrate a 65-fold increase in the pair extraction efficiency compared to quantum dots with equivalent peak fidelity.
  arXiv  Detail & Related papers  (2023-07-12T22:09:19Z)
• Ultrabright and narrowband intra-fiber biphoton source at ultralow pump power [51.961447341691]
  Nonclassical photon sources of high brightness are key components of quantum communication technologies. We here demonstrate the generation of narrowband, nonclassical photon pairs by employing spontaneous four-wave mixing in an optically-dense ensemble of cold atoms within a hollow-core fiber.
  arXiv  Detail & Related papers  (2022-08-10T09:04:15Z)
• Quantum-limited millimeter wave to optical transduction [50.663540427505616]
  Long distance transmission of quantum information is a central ingredient of distributed quantum information processors. Current approaches to transduction employ solid state links between electrical and optical domains. We demonstrate quantum-limited transduction of millimeter-wave (mmwave) photons into optical photons using cold $85$Rb atoms as the transducer.
  arXiv  Detail & Related papers  (2022-07-20T18:04:26Z)
• Silicon nitride waveguides with intrinsic single-photon emitters for integrated quantum photonics [97.5153823429076]
  We show the first successful coupling of photons from intrinsic single-photon emitters in SiN to monolithically integrated waveguides made of the same material. Results pave the way toward the realization of scalable, technology-ready quantum photonic integrated circuitry.
  arXiv  Detail & Related papers  (2022-05-17T16:51:29Z)
• InGaP quantum nanophotonic integrated circuits with 1.5% nonlinearity-to-loss ratio [0.0]
  We realize quantum nanophotonic integrated circuits in thin-film InGaP with a record-high ratio of $1.5%$ between the single-photon nonlinear coupling rate and cavity-photon loss rate. Our work shows InGaP as a potentially transcending platform for quantum nonlinear optics and quantum information applications.
  arXiv  Detail & Related papers  (2021-05-26T17:34:48Z)
• Entangled photon pairs from quantum dots embedded in a self-aligned cavity [0.2493740042317776]
  We introduce a scalable photonic platform that enables efficient generation of entangled photon pairs from a semiconductor quantum dot. We experimentally show collection efficiency of 0.17 combined with a Purcell enhancement of up to 1.7 in the pair emission process.
  arXiv  Detail & Related papers  (2020-10-04T11:55:58Z)
• Optical repumping of resonantly excited quantum emitters in hexagonal boron nitride [52.77024349608834]
  We present an optical co-excitation scheme which uses a weak non-resonant laser to reduce transitions to a dark state and amplify the photoluminescence from quantum emitters in hexagonal boron nitride (hBN) Our results are important for the deployment of atom-like defects in hBN as reliable building blocks for quantum photonic applications.
  arXiv  Detail & Related papers  (2020-09-11T10:15:22Z)
• A bright and fast source of coherent single photons [46.25143811066789]
  A single photon source is a key enabling technology in device-independent quantum communication. We report a single photon source with an especially high system efficiency.
  arXiv  Detail & Related papers  (2020-07-24T17:08:46Z)
• Near-ideal spontaneous photon sources in silicon quantum photonics [55.41644538483948]
  Integrated photonics is a robust platform for quantum information processing. Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, have been elusive. Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements.
  arXiv  Detail & Related papers  (2020-05-19T16:46:44Z)
• On-demand indistinguishable single photons from an efficient and pure source based on a Rydberg ensemble [48.879585399382435]
  Single photons coupled to atomic systems have shown to be a promising platform for developing quantum technologies. Yet a bright on-demand, highly pure and highly indistinguishable single-photon source compatible with atomic platforms is lacking. In this work, we demonstrate such a source based on a strongly interacting Rydberg system.
  arXiv  Detail & Related papers  (2020-03-04T17:16:56Z)
• On-chip deterministic operation of quantum dots in dual-mode waveguides for a plug-and-play single-photon source [0.0]
  A deterministic source of coherent single photons is an enabling device of quantum-information processing. We present a novel nanophotonic device that enables deterministic pulsed excitation of QDs through the waveguide. We demonstrate a coherent single-photon source that simultaneously achieves high-purity.
  arXiv  Detail & Related papers  (2020-01-29T08:09:53Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.